The invention is an advanced circuit arrangement for 1 phase, transformerless PV inverter what outputs being connected through two reactors (L1, L2) to the utility network whilst an energy storage capacitor (C) is connected to the PV array (P) such a way that the energy storage capacitor's (C) + and - terminals are connected to two half bridge (I, II) creating an H bridge so that the AC node of one half bridge (I) connected to the anode of a diode (D1) and the cathode of a diode (D2) whilst AC node of the other half bridge (II) is connected to an anode of a diode (D3) and a cathode of a diode (D4) whilst the four diodes (D1,D2,D3,D4) form a diode bridge and this diode bridge positive node is connected to a transistor's (V5) collector and an anode of a diode (D5), the cathode of the diode (D5) being connected to the energy storage capacitor's (C) positive terminal whilst the negative node of diode bridge (D1,D2,D3,D4) being connected to an emitter of a transistor (V5) and a diode's (D6) cathode, the anode of the diode (D6) is connected to the negative terminal of the energy storage capacitor (C).